diff --git a/apps/mtm/serializers.py b/apps/mtm/serializers.py
index d84577c1..198d4a60 100644
--- a/apps/mtm/serializers.py
+++ b/apps/mtm/serializers.py
@@ -215,8 +215,9 @@ class RouteSerializer(CustomModelSerializer):
     def create(self, validated_data):
         process = validated_data['process']
         routepack = validated_data.get('routepack', None)
-        if routepack and Route.objects.filter(routepack=routepack, process=process).exists():
-            raise ValidationError('已选择该工序!')
+        if routepack:
+            if Route.objects.filter(routepack=routepack, process=process).exists():
+                raise ValidationError('已选择该工序!')
         else:
             material = validated_data.get('material', None)
             if material and process and Route.objects.filter(material=material, process=process).exists():